*{
  margin: 0 auto;
  padding: 0;
}
#menu{
    position: absolute;
    top: 20px;
    left: 50px;
    background: rgba(100, 100, 100, 0.85);
    padding: 10px;
    color: #cccccc;
}
#menu button{
    font-family: "微软雅黑", sans-serif;
    opacity: 1;
    min-width: 55px;
    padding: 4px 6px;
}

/* 删除按钮 */
#delete-wrapper{
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
    padding-bottom: 8px;
}

#delete-wrapper #btn-delete{
    padding: 8px 16px;
    display: inline-block;
    color: #fff;
    cursor: pointer;
    background: rgba(255, 8, 53, 0.85);
}